Hypothetical populations with 3% inaccurate CCR measurement
| Self report | |||||
|---|---|---|---|---|---|
| CCR (ng/mg) | Smoker | Non-smoker | Total | Lee’s misclassification formula | |
| CCR, cotinine/creatinine | |||||
| A: If 10% smoke | |||||
| High (>100) | 97 | 27 | 124 | =27/124=0.21 (21%) | |
| Low (<100) | 3 | 873 | 876 | ||
| Total | 100 | 900 | 1000 | ||
| B: If 30% smoke | |||||
| High (>100) | 291 | 21 | 312 | =21/312=0.06 (6%) | |
| Low (<100) | 9 | 679 | 688 | ||
| Total | 300 | 700 | 1000 | ||